Classes, traits, and interfaces - main - drupal

Introduction to classes

A lot of the PHP code in Drupal is object oriented (OO), making use of PHP classes, interfaces, and traits. See the Objected-oriented programming conventions for more information.

See also

Objected-oriented programming conventions

File

core/core.api.php, line 1529

Name	Deprecated	Object type	Namespace	File name	Summary	Direct uses	Use statements	Strings
FloatInterface		interface	Drupal\Core\TypedData\Type	core/lib/Drupal/Core/TypedData/Type/FloatInterface.php	Interface for floating-point numbers.	1	5
FloatItem		class	Drupal\Core\Field\Plugin\Field\FieldType	core/lib/Drupal/Core/Field/Plugin/Field/FieldType/FloatItem.php	Defines the 'float' field type.
FloatValue		class	Drupal\Core\Database\SchemaDefinition	core/lib/Drupal/Core/Database/SchemaDefinition/FloatValue.php	A class holding a float value.		1
FloodInterface		interface	Drupal\Core\Flood	core/lib/Drupal/Core/Flood/FloodInterface.php	Defines an interface for flood controllers.	3	6
FloodTest		class	Drupal\Tests\system\Kernel\System	core/modules/system/tests/src/Kernel/System/FloodTest.php	Functional tests for the flood control mechanism.
FocusColorPresetUpdateTest		class	Drupal\Tests\default_admin\Kernel	core/themes/default_admin/tests/src/Kernel/FocusColorPresetUpdateTest.php	Tests the update of legacy focus color preset values.
FocusFirstCommand		class	Drupal\Core\Ajax	core/lib/Drupal/Core/Ajax/FocusFirstCommand.php	AJAX command for focusing an element.		4
FocusFirstCommandTest		class	Drupal\FunctionalJavascriptTests\Ajax	core/tests/Drupal/FunctionalJavascriptTests/Ajax/FocusFirstCommandTest.php	Tests setting focus via AJAX command.
FolderTest		class	Drupal\FunctionalTests	core/tests/Drupal/FunctionalTests/FolderTest.php	Tests BrowserTestBase's treatment of hook_install() during setup.
FollowUpMigrationsTest		class	Drupal\Tests\migrate_drupal\Kernel\d6	core/modules/migrate_drupal/tests/src/Kernel/d6/FollowUpMigrationsTest.php	Tests follow-up migrations.
FollowUpMigrationsTest		class	Drupal\Tests\migrate_drupal\Kernel\d7	core/modules/migrate_drupal/tests/src/Kernel/d7/FollowUpMigrationsTest.php	Tests follow-up migrations.
FontFamily		class	Drupal\Core\Theme\Plugin\DesignTokenValue	core/lib/Drupal/Core/Theme/Plugin/DesignTokenValue/FontFamily.php	Font family design token value.		5
FontFamilyTest		class	Drupal\Tests\Core\Theme\DesignToken\Plugin	core/tests/Drupal/Tests/Core/Theme/DesignToken/Plugin/FontFamilyTest.php	Tests font family value plugin.
FontWeight		class	Drupal\Core\Theme\Plugin\DesignTokenValue	core/lib/Drupal/Core/Theme/Plugin/DesignTokenValue/FontWeight.php	Font weight design token value.		4
FontWeightTest		class	Drupal\Tests\Core\Theme\DesignToken\Plugin	core/tests/Drupal/Tests/Core/Theme/DesignToken/Plugin/FontWeightTest.php	Tests font weight value plugin.
Foo		class	Drupal\image_test\Plugin\ImageToolkit\Operation\test	core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/Foo.php	Builds an image toolkit operation.
FooAccessPolicy		class	Drupal\Tests\Core\Session	core/tests/Drupal/Tests/Core/Session/AccessPolicyProcessorTest.php	A test access policy for admin and for 'foo' and 'bar' permissions.
FooCacheContext		class	Drupal\Tests\Core\Cache\Context	core/tests/Drupal/Tests/Core/Cache/Context/CacheContextsManagerTest.php	Fake cache context class.
FooDerived		class	Drupal\image_test\Plugin\ImageToolkit\Operation\test	core/modules/system/tests/modules/image_test/src/Plugin/ImageToolkit/Operation/test/FooDerived.php	Builds an image toolkit operation.
FooTest		final class	Drupal\Tests\Component\Foo	core/tests/PHPStan/fixtures/component-tests.php
ForeignKey		final class	Drupal\Core\Database\SchemaDefinition	core/lib/Drupal/Core/Database/SchemaDefinition/ForeignKey.php	Describes a database foreign key.		7
Form		class	Drupal\Core\Render\Element	core/lib/Drupal/Core/Render/Element/Form.php	Provides a render element for a form.
Form		class	Drupal\router_test	core/modules/system/tests/modules/router_test_directory/src/Form.php	Form to test _form routing.			1
FormActionXssTest		class	Drupal\KernelTests\Core\Form	core/tests/Drupal/KernelTests/Core/Form/FormActionXssTest.php	Ensures that a form's action attribute can't be exploited with XSS.
FormAjaxException		class	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormAjaxException.php	Custom exception to break out of AJAX form processing.		2
FormAjaxResponseBuilder		class	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormAjaxResponseBuilder.php	Builds an AJAX form response.		1	2
FormAjaxResponseBuilderInterface		interface	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormAjaxResponseBuilderInterface.php	Provides an interface for building AJAX form responses.	1	2
FormAjaxResponseBuilderTest		class	Drupal\Tests\Core\Form	core/tests/Drupal/Tests/Core/Form/FormAjaxResponseBuilderTest.php	Tests Drupal\Core\Form\FormAjaxResponseBuilder.
FormAjaxSubscriber		class	Drupal\Core\Form\EventSubscriber	core/lib/Drupal/Core/Form/EventSubscriber/FormAjaxSubscriber.php	Wraps AJAX form submissions that are triggered via an exception.		1	2
FormAjaxSubscriberTest		class	Drupal\Tests\Core\Form\EventSubscriber	core/tests/Drupal/Tests/Core/Form/EventSubscriber/FormAjaxSubscriberTest.php	Tests Drupal\Core\Form\EventSubscriber\FormAjaxSubscriber.
FormatDate		class	Drupal\migrate\Plugin\migrate\process	core/modules/migrate/src/Plugin/migrate/process/FormatDate.php	Converts date/datetime from one format to another.		1
FormatDateTest		class	Drupal\Tests\migrate\Unit\process	core/modules/migrate/tests/src/Unit/process/FormatDateTest.php	Tests the format date process plugin.
FormatDateTest		class	Drupal\Tests\system\Functional\Common	core/modules/system/tests/src/Functional/Common/FormatDateTest.php	Tests the DateFormatterInterface::format() function.
FormatPluralUpdateTest		class	Drupal\Tests\views\Functional\Update	core/modules/views/tests/src/Functional/Update/FormatPluralUpdateTest.php	Tests the upgrade path for converting format_plural from integer to boolean.
FormattableMarkup		class	Drupal\Component\Render	core/lib/Drupal/Component/Render/FormattableMarkup.php	Formats a string for HTML display by replacing variable placeholders.	1	49
FormattableMarkupKernelTest		class	Drupal\KernelTests\Component\Render	core/tests/Drupal/KernelTests/Component/Render/FormattableMarkupKernelTest.php	Provides a test covering integration of FormattableMarkup with other systems.
FormattableMarkupTest		class	Drupal\Tests\Component\Render	core/tests/Drupal/Tests/Component/Render/FormattableMarkupTest.php	Tests the TranslatableMarkup class.
FormattedDateDiff		class	Drupal\Core\Datetime	core/lib/Drupal/Core/Datetime/FormattedDateDiff.php	Contains a formatted time difference.		1
FormatterBase		abstract class	Drupal\Core\Field	core/lib/Drupal/Core/Field/FormatterBase.php	Base class for 'Field formatter' plugin implementations.	33	33
FormatterInterface		interface	Drupal\Core\Field	core/lib/Drupal/Core/Field/FormatterInterface.php	Interface definition for field formatter plugins.	1	3	1
FormatterPluginManager		class	Drupal\Core\Field	core/lib/Drupal/Core/Field/FormatterPluginManager.php	Plugin type manager for field formatters.		6	2
FormatterPluginManagerTest		class	Drupal\Tests\field\Kernel	core/modules/field/tests/src/Kernel/FormatterPluginManagerTest.php	Tests the field formatter plugin manager.
FormBase		abstract class	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormBase.php	Provides a base class for forms.	159	153
FormBuilder		class	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormBuilder.php	Provides form building and processing.		3	2
FormBuilderInterface		interface	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormBuilderInterface.php	Provides an interface for form building and processing.	1	35
FormBuilderTest		class	Drupal\Tests\Core\Form	core/tests/Drupal/Tests/Core/Form/FormBuilderTest.php	Tests Drupal\Core\Form\FormBuilder.
FormCache		class	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormCache.php	Encapsulates the caching of a form and its form state.		1	2
FormCacheInterface		interface	Drupal\Core\Form	core/lib/Drupal/Core/Form/FormCacheInterface.php	Provides an interface for the caching of a form and its form state.	2	1
FormCacheTest		class	Drupal\Tests\Core\Form	core/tests/Drupal/Tests/Core/Form/FormCacheTest.php	Tests Drupal\Core\Form\FormCache.
FormCacheTest		class	Drupal\KernelTests\Core\Form	core/tests/Drupal/KernelTests/Core/Form/FormCacheTest.php	Tests FormBuilder caching.

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